Lark Quarry dinosaur tracksite (QM) (Cretaceous of Australia)

Also known as "dinosaur stampede", Winton

Where: Queensland, Australia (23.1° S, 142.8° E: paleocoordinates 52.8° S, 132.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Winton Formation (Rolling Downs Group), Early/Lower Cenomanian (99.6 - 93.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; poorly lithified, red sandstone and lithified, red claystone

• lacustrine origin. "Sandstones above and below the footprint bed probably resulted from periodic sheet-floods...Shrinkage of the lake had exposed extensive mud-flats marked with narrow run-off channels."
• "Sediments exposed at Lark Quarry are mainly soft and fine-grained arkosic sandstones of reddish-buff colour. The sandstones for thick beds (each built of innumerable small sets of cross-bedding) and are interlayered with thin and persistent seams of indurated pinkish claystone. The dinosaur tracks are impressed in an 8-10 cm seam of finely laminated claystone that is evidently of lacustrine origin...There are no ripple-marks, rain-prints or sun-cracks, and the dinosaur tracks were impressed in firm moist mud."

Size class: macrofossils

Preservation: mold/impression, trace

Collected in 1976

Collection methods: surface (in situ), mechanical,

• more than 130 individual dinosaurs

Primary reference: Y. Evans. 1977. Molding and casting a dinosaur trackway. Kalori 53:39-41 [M. Carrano/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 28606: authorized by Matthew Carrano, entered by Matthew Carrano on 20.02.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Saurischia -
Skartopus australis n. gen. n. sp.2
Skartopus australis n. gen. n. sp.2 Thulborn and Wade 1984 theropod
 Neornithischia - Hadrosauridae
Tyrannosauropus sp.1 Haubold 1971 hadrosaurid
11 tracks; QM F10322
 Neornithischia -
Wintonopus latomorum n. gen. n. sp.2
Wintonopus latomorum n. gen. n. sp.2 Thulborn and Wade 1984 bird foot dinosaur